@book { SecondHandSoftwareimurheberrechtlichenKontext,
    title = "Second Hand-Software im urheberrechtlichen Kontext",
    author = "Stefan {Bröckers}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1135732"
}